rainbowz
is a Zig implementation of the Rainbow Brainfuck programming language
To build it you'll need the most recent Zig version (download from https://ziglang.org/download).
$ zig build -Doptimize=ReleaseFast
or to build a debug version
$ zig build
the binary will then appear as zig-out/bin/rainbowz
or zig-out\bin\rainbowz.exe